Any hidden games that are not mentioned enough?

Does anyone know of any games that have a great story or gameplay but were completely overlooked?

And don't say something like "Outer Wilds". I want games that very few of us have heard before or at least are not on first page on steam or any other stores.

For example, I currently played "Cat in the box" on steam. It's a great horror game, I had lots of fun with it!

Edit: Just realized I wrote hidden games and not "gems". I guess that works too.

Edit 2: Holy christ guys, where did you find all these games?! I check every mentioned game and they all have great reviews. This is exactly what I was searching for! Keep 'em up!